ABB REL 501-C1 2.5 Technical Reference Manual page 82

70
Distance protection (ZM)
Function
Impedance setting Reactive reach
range at I = 1 A (to
r
be divided by 5 at I
r
= 5 A)
Resistive reach Positive-sequence
Fault resistance For phase - phase
Setting range of timers for impedance zones
Static accuracy at 0 Voltage range (0.1-1.1) x U
degrees and 85
Current range (0.5-30) x I
degrees
Static angular accu- Voltage range (0.1-1,1) x U
racy at 0 degrees
Current range (0.5-30) x I
and 85 degrees
Max dynamic overreach at 85 degrees measured with CVT's
0.5 < SIR < 30
Value
(0.10-400.00) Ω /phase in steps of 0.01 Ω
Positive-sequence
reactance
(0.10-1200.00) Ω /phase in steps of 0.01
Zero sequence reac-
Ω
tance
(0.10-400.00) Ω /phase in steps of 0.01 Ω
resistance
(0.10-1200.00) Ω /phase in steps of 0.01
Zero sequence resis-
Ω
tance
(0.10-400.00) Ω /loop in steps of 0.01 Ω
faults
For phase-earth faults (0.10-400.00) Ω /loop in steps of 0.01 Ω
(0.000-60.000) s in steps of 1 ms
+/- 5 %
r
r
+/- 5 degrees
r
r
+ 5 %
Chapter 4
Line distance